Hourly fine particulate matter (PM2.5) at 1285 US monitoring stations, compared against the FireSmoke, FireWork and HRRR smoke forecasts.
National outlookAcross the United States, 1149 monitoring stations are currently reporting air quality conditions. Of these, 535 stations are in the Good range, 474 in the Moderate range, 77 in the Unhealthy for Sensitive Groups range, 52 in the Unhealthy range, 9 in the Very Unhealthy range, and 2 in the Hazardous range. The most affected areas include Prineville - Davidson Park, Oregon, with a current PM2.5 level of 424 µg/m³ and a forecast to exceed 500 µg/m³ in the next 48 hours, and E Wenatchee 8th St NE, Washington, with a current level of 280 µg/m³. Other severely impacted locations are Hood River West Side FD, Oregon, at 214 µg/m³, Wenatchee Methow St, Washington, at 210 µg/m³, and Entiat, Washington, at 194 µg/m³. Over the next 48 hours, models predict the highest smoke levels in Winthrop-Chewuch Rd, Washington; Twisp-S Lincoln St, Washington; Hood River West Side FD, Oregon; Soap Lake, Washington; Omak-Colville Tribe, Washington; and San Andreas, California, all forecast to exceed 500 µg/m³.
AI-generated summary of the latest observations and forecasts — may contain errors and is based only on official federal, state, local and tribal data · updated Aug 06, 1:44PM EDT
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Forecast PM2.5 peaks from now, using the higher available model value
PM2.5 observations and smoke forecasts (µg/m³)
Observations and NowCast are total PM2.5 — wildfire smoke plus every other source — as regulatory monitors measure it, and FireWork models that same total. FireSmoke is a smoke-dispersion model: it estimates the wildfire contribution only, so it reads lower than the monitors whenever other sources matter. The map's optional plume layer is likewise fires-only.
Stated times are local to the selected station and mark the end of each
measurement hour, as agency displays do. FireSmoke is UBC's BlueSky dispersion model;
FireWork is ECCC's operational chemistry model; HRRR-Smoke is NOAA's 3 km smoke
model. NowCast is the US EPA's smoke-responsive weighted average of recent hours;
the shaded bands are US EPA AQI category thresholds (24-h basis, 2024 revision),
which apply to NowCast — not to single hourly readings.
The dashed line marks now; forecasts extend beyond it.
Data table
Time (local)
Observed µg/m³
FireSmoke µg/m³
FireWork µg/m³
Map layers
Fires
Smoke & weather
Selected observation
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Forecast models
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Page generated
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Next scheduled refresh
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Smoke forecasts by city
Select a state for an overview of every monitor there.
This site aggregates public air-quality measurements and smoke forecasts for general information. It is not an emergency service and is not monitored. Always follow the advice of local or state authorities and refer to official government sources of information.